In the Walk and Turn (WAT) test, what type of surface is required for the test?

The Walk and Turn (WAT) test requires a reasonably flat and non-slippery surface to ensure that the test can accurately assess a person's balance and coordination. A surface that meets these criteria helps to minimize any external factors that could interfere with the performance of the test. A flat and stable ground allows the individual to focus on the task without additional challenges posed by the terrain, which is crucial for obtaining valid results in assessing potential impairment.

Surfaces that are sandy, uneven, or slippery could lead to difficulties that are unrelated to the individual's sobriety or coordination abilities, thereby skewing the results. A firm and elevated surface, while stable, could introduce challenges of its own pertaining to height and angle that are not relevant to the assessment's intent. Thus, the emphasis is on a flat, non-slippery surface that allows for a fair evaluation of the individual's walking ability and balance during the test.